JP2005290482A - Composite porous body and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a composite porous body of which handleability can be improved, and its manufacturing method. <P>SOLUTION: The composite porous body has: a frame part 12 in which a plurality of ribs 11 are connected together in a surface direction and a plurality of two-dimensional networks 11A are formed by the ribs 11; and a porous body 13 having a three-dimensional network structure and provided inside the two-dimensional networks 11A of the frame part 12. The porous body 13 is joined to the ribs 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a composite porous body including a porous body having a three-dimensional network structure and a method for producing the same.

  Conventionally, this type of porous body has been used for various applications, and a typical example thereof is an application as a filter member. For example, as shown in Patent Documents 1 to 3 below, in automobiles or the like having an engine that uses petroleum-based fuel, fine particles mainly containing carbon contained in the exhaust gas are collected and removed. An exhaust gas purification device is provided, and a configuration in which the porous body as a filter member is used in the exhaust gas purification device is known.

First, in Patent Documents 1 and 2 below, an inflow port through which exhaust gas flows into one end is formed, and an outflow port through which the washed exhaust gas flows out to the outside is formed at the other end. There is disclosed a configuration in which a filter case and a cylindrical porous body disposed inside the filter case are provided, and shielding plates are disposed on both axial end surfaces of the porous body. In this configuration, exhaust gas flows from the inlet into the filter case, the exhaust gas flows from the outer surface of the porous body inward in the radial direction, and the inner surface thereof inward in the radial direction. By passing in the direction, the fine particles in the exhaust gas are collected by these porous bodies, and then the exhaust gas flows out from the outlet of the filter case to the outside.
Next, in Patent Document 3 below, the porous body is obtained by sintering a powdered or granular material such as a metal, ceramic material or plastic material coated in a mesh of metal fibers or the like. A composite sintered body is disclosed.
JP-A-10-317945 JP-A-6-257422 JP-A-5-245317

  By the way, among the prior art, in Patent Documents 1 and 2, since the porous body is low in strength and easily deformed, it is generally difficult to handle the porous body, and it is difficult to incorporate the porous body into an exhaust gas cleaning device. There was a problem that there was. In order to form a porous body into a cylindrical shape, first, after forming a sheet-like porous body, it is bent into a cylindrical shape, so that a compressive force acting on the inner peripheral surface side is used. While the pores of the porous body located in this part may be crushed, the mesh defining the pores of the porous body located in this part is broken by the tensile force on the outer peripheral surface side, and therefore the inner circumference There is a problem that the porosity of the surface side is small and the porosity of the outer peripheral surface side is large, and it is difficult to adjust the porosity of the cylindrical porous body with high accuracy. Furthermore, since the porous body has a three-dimensional network structure, it is difficult to satisfactorily bond the axially opposite end surfaces of the cylindrical porous body and the shielding plate. There is a problem that it is difficult to reliably realize a configuration in which exhaust gas leaks from both end faces.

  Further, in Patent Document 3, there is a limit to increasing the porosity of the sintered body, and it is difficult to provide the sintered body with flexibility. There was a problem that the bonding strength with the was relatively low. In this case, as described above, when the composite sintered body having a flat plate shape is bent and formed into a cylindrical shape, a mesh of metal fibers or the like is generated by a compressive force and a tensile force acting on the inner and outer surfaces, respectively. Therefore, there is a problem that the sintered body easily falls off. This problem may occur in the same manner due to a temperature cycle acting on the composite sintered body by repeatedly using or not using the exhaust gas cleaning device, or when high-pressure air is passed.

  The problems related to Patent Documents 1 to 3 described above are similarly applied to a cylindrical reforming section constituting a reformer that reforms a hydrocarbon-based city gas or the like into a gas mainly composed of hydrogen. Can occur.

  This invention is made | formed in view of the above subject, and it aims at providing the composite porous body which can aim at the improvement of a handleability, and its manufacturing method.

In order to solve the above-described problems and achieve such an object, the present invention proposes the following means.
The composite porous body of the present invention includes a bone portion in which a plurality of aggregates are continuously arranged in a plane direction, and a plurality of two-dimensional meshes defined by the aggregates, and the two-dimensional mesh of the bone portions. And a porous body having a three-dimensional network structure disposed inside, and the porous body is bonded to the aggregate.
Further, in the method for producing a composite porous body of the present invention, a plurality of aggregates are continuously arranged in a plane direction, and a plurality of two-dimensional networks are defined by these aggregates. The inside is filled with a slurry in which a metal powder, a foaming agent, an organic binder, a solvent and the like are mixed, and then the slurry is heated to foam the foaming agent to form a foam. The foam is dried and degreased, and then the foam is fired to form a porous body joined to the aggregate of the bone.

  According to these inventions, since the porous body is joined to the aggregate, deformation of the porous body can be suppressed by the aggregate, and the handling property can be improved. Therefore, for example, it becomes possible to reduce the number of man-hours when incorporating this composite porous body into an exhaust gas cleaning device, a reformer or the like. Also, when manufacturing the composite porous body, the slurry is filled inside the two-dimensional network of the bone, and the slurry is foamed to form a foam, and then the foam is dried and degreased, and then the foam is formed. Since the body is fired to form a porous body joined to the aggregate, it is possible to realize a strong joint between the porous body and the aggregate. That is, since the porous body is formed by firing the foam in contact with the aggregate, it is possible to improve the bonding strength between the aggregate and the porous body, and the three-dimensional network structure. Due to the flexibility of the porous body resulting from the above, when an external force acts on the composite porous body, it is possible to relieve the stress acting on the joint interface between the porous body and the aggregate. Therefore, when the obtained sheet-like composite porous body is subjected to a bending process, even if a tensile force acts on the outer surface and a compressive force acts on the inner surface, the bone that defines the two-dimensional network is formed. It is possible to suppress the porous body from peeling off from the material. Similarly, even when this composite porous body is used under a temperature cycle or when high-pressure air is allowed to pass, it is possible to prevent the porous body from falling off from the aggregate.

  Moreover, it is good also considering the porous body as below the thickness of a bone part so that an aggregate may be exposed from the surface of a porous body. In this case, since the porous body is partitioned by the aggregate, after forming the sheet-like composite porous body and bending it to form, for example, a cylindrical shape, in the porous body It is possible to minimize the amount of tensile deformation on the outer peripheral surface and the amount of compressive deformation on the inner peripheral surface. That is, the deformation of the porous body does not continuously occur over the entire circumference of the composite porous body formed into a cylindrical shape, but is intermittently referred to within an individual two-dimensional network defined by the aggregate. Will occur. Therefore, even if a cylindrical composite porous body is formed by the bending process, the mesh that defines the pores on the outer peripheral surface side of the porous body is broken or the pores on the inner peripheral surface side are crushed. Therefore, the porosity of the porous body constituting the cylindrical composite porous body can be adjusted with high accuracy.

  In addition, such a composite porous body is obtained by crushing the foam swelled from the surface of the bone part or foaming the slurry before degreasing the foam after drying the foam. When forming the foam, pressing the front and back surfaces of the bone part or placing a film member (for example, a PET film) to close the two-dimensional network, or firing the foam In addition, the foam can be formed by heating while crushing. In this case, before the foam is fired to form a porous body, the foam and the aggregate of the bone portion are brought into close contact in advance, and then the foam can be fired. As a result, it is possible to reliably realize a strong joint between the aggregate and the porous body.

  Furthermore, the bone part may be exposed from the end face of the porous body. In this case, in the composite porous body having a cylindrical shape, if the bone portion is exposed from the end surface in the axial direction, for example, when the composite porous body is incorporated into an exhaust gas cleaning device, the composite porous body In order to dispose the shielding plate on the end face in the axial direction, the bone portion of the composite porous body and the shielding plate can be joined. Therefore, it is possible to realize a strong and tight bonding between the composite porous body and the shielding plate, and the occurrence of problems such as exhaust gas leaking back from the shielding plate and the composite porous body. Can be suppressed.

  Moreover, when the said foam is baked and the said porous body is formed, you may heat-heat the said foam. In this case, the foam can be uniformly heated and fired in the thickness direction and the direction along the surface, and variation in product quality of the obtained porous body can be suppressed to the minimum. .

  Embodiments of the present invention will be described below with reference to the drawings. In the composite porous body 10 in the present embodiment, as shown in FIG. 1, a plurality of aggregates 11 are connected in the plane direction, and a plurality of two-dimensional meshes 11 </ b> A are formed by these aggregates 11. A defined bone portion 12, and a porous body 13 having a three-dimensional network structure disposed inside the two-dimensional network 11 A of the bone portion 12, and the porous body 13 is attached to the aggregate 11. It is set as the schematic structure joined, and as shown to Fig.1 (a), it is set as the planar view rectangular shape. In addition, the porous body 13 has a thickness equal to or less than the thickness of the bone portion 12 in the present embodiment, and the aggregate 11 is exposed from the front and back surfaces of the composite porous body 10. Furthermore, in this embodiment, the bone part 11 is exposed also from the side surface of the composite porous body 10, and the outer surfaces of all the front and back surfaces and side surfaces of the composite porous body 10 that are rectangular in plan view as described above. Therefore, the aggregate 11 is exposed. In addition, the thickness of the composite porous body 10 is about 0.1 mm or more and 2.0 mm or less.

As will be described later, the porous body 13 is composed of a metal powder such as Fe-25% Cr-5% Al powder, SUS316L powder, or Ti powder, an organic binder (for example, methylcellulose or hydroxypropylmethylcellulose), and a foaming agent (for example, carbon number). Metal powders are sintered by degreasing and firing a slurry containing 5-8 water-insoluble hydrocarbon organic solvent (for example, neopentane, hexane, heptane)) and a solvent (for example, water) after foam molding. Is formed.
The bone portion 12 is an expanded metal, a wire mesh, or a punching metal, that is, the two-dimensional network 11A penetrates in the thickness direction, and the porous body 13 is joined to the aggregate 11 in the two-dimensional network 11A. It is the structure arrange | positioned by. In the bone part 12, the material of the expanded metal is, for example, SUS316L, the material of the punching metal is, for example, Ti, and the material of the wire mesh is, for example, Fe-25% Cr-5% Al.

An embodiment of a method for producing the composite porous body 10 configured as described above will be described.
First, a schematic configuration of a manufacturing apparatus for carrying out this manufacturing method will be described with reference to FIGS. This apparatus includes a slurry tank 21 filled with a slurry S, a scraping member 22 disposed above the upper end opening of the slurry tank 21, and a foam tank (not shown) that foams the slurry S to form a foam. A drying furnace (not shown) for drying the foam, a pressing roll (not shown) for pressing the dried foam, a firing furnace section for degreasing and firing the pressed foam, and a long length It is made into the schematic structure provided with the bone part running means (not shown) which runs the bone part 12 of this. The bone part traveling means includes a plurality of rollers (not shown) around which the long bone part 12 is wound, and the bone part 12 sequentially and sequentially supplies each of the constituent elements 21, 22. It can be passed.

  The scraping member 22 is configured to scrape off the slurry S adhered to the front and back surfaces of the bone portion 12 that has passed through the slurry tank 21 in a built-up state, and is provided as a pair so as to face the front and back surfaces of the bone portion 12. These intervals are adjustable. In addition, by making the distance between the tips of the pair of scraping members 22 smaller than the thickness of the bone portion 12, the front and back surfaces of the slurry S are put into the two-dimensional mesh 11A of the bone portion 12 by the tips of the scraping member 22. Even when pores are included in the slurry S that is pushed in from each and attached to the bone part 12, the pores can be excluded from the slurry S. In this case, it is desirable to form the scraping member 22 from a flexible rubber material.

The pressing roll is supported so as to be rotatable about a horizontal rotation axis extending in the width direction of the bone portion 12 in the running state, and presses the bone portion 12 in the running state while rotating from the front and back sides. It is like that.
The firing furnace section includes a degreasing furnace (not shown) that degreases the foam, and a firing furnace 23 that fires the degreased foam. Inside the firing furnace 23, an energizing roll section 24 that heats the foam is provided. The arrangement is arranged.
The energizing roll portion 24 is supported in the firing furnace 23 so as to be rotatable about a horizontal rotation axis extending in the width direction of the bone portion 12 in a running state, and is filled in the two-dimensional mesh 11A of the bone portion 12. In addition, a schematic configuration is provided that includes a pair of energizing rolls 24A that are in contact with the foam and allow current to flow, that is, energized and heated, and a power source 24B that supplies current to the energizing roll 24A. The energizing roll 24A is provided at a plurality of locations with respect to the traveling direction F of the bone portion 12 (in the example of FIG. 3, two locations on the front side and the rear side with respect to the traveling direction F). The bone portion 12 and the front and back surfaces of the foam are in contact with each other over the entire width direction.

A method of manufacturing the composite porous body 10 using the above manufacturing apparatus will be described.
First, as shown in FIG. 2, the long bone portion 12 is caused to enter the inside of the tank 21 from the lower portion of the slurry tank 21 filled with the slurry S, and then the bone portion 12 is moved upward to obtain the slurry. The bone part 12 is pulled out from the upper end opening of the tank 21. At this time, the slurry S adheres to the front and back surfaces of the long bone portion 12 in a built-up state. Then, by moving the bone part 12 further upward, the slurry S adhered in the build-up state by the tips of the pair of scraping members 22 disposed above the upper end opening part of the slurry tank 21. Scrape.

Next, the bone part 12 having the slurry S is further run to pass through the foaming tank. In this foaming tank, the slurry S is heated at about 25 ° C. to 80 ° C. in a high humidity atmosphere where the humidity is set to about 65% or more, and the foaming agent contained in the slurry S is foamed. At this time, since the humidity is set to about 65% or more, the slurry S is foamed well without cracking.
Thereafter, the bone portion 12 having the foamed slurry S (hereinafter simply referred to as foam) is further run and passed through the drying furnace. In this drying furnace, the inside is heated to, for example, 30 ° C. to 150 ° C. by a far-infrared heater lamp, and dry air having substantially the same temperature as the heating temperature by the heater lamp is supplied to the inside. Under this environment, the foam is dried, and the metal powder forming cavities between the particles by the foaming is joined by the organic binder.

Next, the bone part 12 having this foam is further run to pass the position where the pressing roll is disposed. As a result, even when the foam swells from the front and back surfaces of the aggregate 12 due to the foaming of the slurry S in the foaming tank, this swell is crushed and the thickness and porosity of the foam are adjusted. Is done.
Then, the bone part 12 which has this foam is further run, and the said baking furnace part is passed. At this time, the degreasing furnace is first passed. In this degreasing furnace, the inside is set to 400 ° C. to 700 ° C., and when the metal powder contained in the slurry S is SUS316L powder or Ti powder, a reducing atmosphere or a vacuum atmosphere is set.

  Then, the degreased foam is further run and passed through the firing furnace 23. In the firing furnace 23, the inside is set to a reducing atmosphere, an inert atmosphere, or a vacuum atmosphere, and when the slurry S is SUS316L powder, the internal temperature is set to 1100 ° C. to 1350 ° C. The energizing roll 24A disposed inside the firing furnace 23 as described above causes an electric current to flow across the entire surface in the direction along the surface of the foam and in the thickness direction, and Joule heat is applied to the foam. The foam is fired by this heat. As a result, the binder is removed and the metal powders are sintered to form a porous body 12 having a three-dimensional network structure, and a long composite in which the porous body 12 is bonded to the aggregate 11. A porous body is formed. Then, the composite porous body made into this elongate is cut | disconnected by predetermined length, and the composite porous body 10 shown in FIG. 1 is formed.

An application example of the composite porous body 10 configured as described above will be described.
First, an exhaust gas cleaning apparatus to which the composite porous body 10 is applied will be described with reference to FIG. The exhaust gas cleaning device 30 shown in this figure is installed in an engine using petroleum-based fuel, particularly a car having a diesel engine, and mainly contains carbon contained in the exhaust gas 30a from the engine. Particulate fine particles can be collected and removed. The exhaust gas cleaning device 30 has an inlet 31 into which exhaust gas 30a flows into one end and an outlet 32 through which the cleaned exhaust gas 30a flows out to the other end. Filter case 33, composite porous body 10 bent into a cylindrical shape, and first and second shielding plates 34 a and 34 b disposed on both axial end surfaces of composite porous body 10. ing.

  The composite porous body 10 has both axial end faces opposed to the inlet 31 and outlet 32 of the filter case 33, and there is a gap between the inner surface of the filter case 33 and the outer surface of the composite porous body 10. The filter case 33 is disposed so as to be formed. In the present embodiment, the composite porous body 10 has a configuration in which the central portion in the radial direction on both end surfaces in the axial direction faces the inlet 31 and the outlet 32 of the filter case 33. Of the both end faces of the composite porous body 10, one end face facing the inlet 31 of the case 33 is a disc so that the inner peripheral surface side of the composite porous body 10 made cylindrical is closed. A first shielding plate 34a is provided. Note that the outer diameter of the shielding plate 34 a is equal to or greater than the outer diameter of the composite porous body 10. A second shielding plate 34b having a ring shape is disposed on the other end face of the composite porous body 10 facing the outflow port 32 of the filter case 33, and the inner diameter thereof is the composite porous body 10. The outer diameter is set to be equal to or larger than the outer diameter of the composite porous body. In the above configuration, the first and second shielding plates 34 a and 34 b are coaxially disposed on both end faces of the composite porous body 10. Here, the aggregate 11 is exposed at the both end faces of the composite porous body 10, and the first and second shielding plates 34 a and 34 b are joined to the aggregate 11.

  In the exhaust gas cleaning device 30 configured as described above, the exhaust gas 30 a from the engine first flows into the case 33 from the inlet 31 of the filter case 33. Thereafter, the exhaust gas 30a is prevented from flowing into the composite porous body 10 from the one end face by the first shielding plate 34a, and the exhaust gas 30a is radially outward along the surface of the shielding plate 34a. It is flowed toward. The exhaust gas 30a that has reached the outer peripheral edge of the first shielding plate 34a flows toward the other end face of the composite porous body 10 from the outer peripheral face of the composite porous body 10. The exhaust gas 30a comes into contact with the three-dimensional network of the porous body 11 until it reaches the inner peripheral surface after flowing into the interior, whereby the fine particles in the exhaust gas 30a are collected and removed. The gas 30a will be purified. Thereafter, the purified exhaust gas 30 a sequentially flows out through the opening in the other end face of the composite porous body 10 and the outlet 32 of the filter case 33.

Next, a reformer to which the composite porous body 10 is applied will be described with reference to FIG.
A reformer 40 shown in this figure is one component of a device for reforming a fuel such as a hydrocarbon-based city gas into a gas containing hydrogen as a main component. In addition, the main configuration mainly includes a transformer and a CO remover.
The reformer 40 includes a heat insulating part 41, a composite porous body 10 disposed inside the heat insulating part 41, a supply pipe 42 for supplying city gas and water from the upper end surface of the composite porous body 10, and reforming It is made into the schematic structure provided with the burner 43 arrange | positioned in the lower part in the inside of the container 40. FIG.

  The heat insulating portion 41 is formed in a bottomed cylindrical shape and is disposed in a state of opening downward, and a through hole 41a is formed in the top surface portion. The composite porous body 10 is cylindrical, and the outer peripheral surface thereof is in contact with the inner peripheral surface of the heat insulating portion 41 and the upper end surface thereof is in contact with the inner surface of the top surface portion of the heat insulating portion 41. It is coaxially disposed inside the portion 41. The supply pipe 42 is disposed in a state of penetrating the top surface portion of the heat insulating portion 41, and the tip opening portion thereof is in communication with the internal pores from the upper end portion of the composite porous body 10. Note that a steam reforming catalyst is applied to the porous body 12 of the composite porous body 10.

In the reformer 40 configured as described above, the fuel and water supplied from the supply pipe 42 to the composite porous body 10 are transported in the axial direction inside the porous body 12 of the composite porous body 10. In the process, CO and H ₂ are generated from the fuel and water by reacting with the catalyst applied to the porous body 12. The produced CO is then transferred to the transformer, where CO and H ₂ O react to produce CO ₂ and H _2, and still remaining CO. Is further transferred to the CO remover, in which CO and 0.5O ₂ are reacted to produce CO ₂ .

  As described above, according to the composite porous body according to the present embodiment, since the porous body 13 is joined to the aggregate 11, deformation of the porous body 13 can be suppressed by the aggregate 11, This handling property can be improved. Therefore, for example, it becomes possible to reduce the number of man-hours when the composite porous body 10 is incorporated into the exhaust gas cleaning device 30 shown in FIG. 4, the reformer 40 shown in FIG. Further, when the composite porous body 10 is manufactured, the slurry S is filled inside the two-dimensional network 11A of the bone portion 12, and then the slurry S is foamed to obtain a foam, and then the foam is dried and degreased. Then, since the foam is fired to form the porous body 13 joined to the aggregate 11, a strong joint between the porous body 13 and the aggregate 11 can be realized. In other words, since the porous body 13 is formed by firing the foam in contact with the aggregate 11, the bonding strength between the aggregate 11 and the porous body 13 can be improved, and the porous body 13 can be made porous. Due to the flexibility resulting from the three-dimensional network structure of the porous body 13, the stress acting on the joint interface between the porous body 13 and the aggregate 11 when an external force is applied to the composite porous body 10 can be relaxed. It becomes possible. Therefore, when the obtained sheet-like composite porous body 10 is subjected to a bending process, the two-dimensional network 11A is defined even if a tensile force acts on the outer surface and a compressive force acts on the inner surface. It is possible to prevent the porous body 13 from being peeled off from the aggregate 11 to be removed. Similarly, even when this composite porous body 10 is used under a temperature cycle or when high-pressure air is allowed to pass through, it is possible to suppress the dropping of the porous body 13 from the aggregate 11.

  Further, since the porous body 13 is set to be equal to or less than the thickness of the bone portion 12 so that the aggregate 11 is exposed from the surface of the porous body 13, the porous body 13 is partitioned by the aggregate 11 and is in a sheet form When the composite porous body 10 is bent and then formed into a cylindrical shape, for example, the amount of tensile deformation of the outer peripheral surface and the amount of compressive deformation of the inner peripheral surface of the porous body 13 are minimized. Can be suppressed. That is, the deformation of the porous body 13 does not occur continuously over the entire circumference of the cylindrical composite porous body 10, but individual two-dimensional networks 11 </ b> A defined by the aggregate 11. In other words, it occurs intermittently. Therefore, even if the cylindrical composite porous body 10 is formed by the bending process, the mesh defining the pores on the outer peripheral surface side of the porous body 13 is broken or the pores on the inner peripheral surface side are crushed. This can be suppressed, and the porosity of the porous body 13 constituting the cylindrical composite porous body 10 can be adjusted with high accuracy.

  Furthermore, in the embodiment, when forming the composite porous body 10, the slurry S filled in the two-dimensional network 11 </ b> A of the bone portion 12 is foamed to form a foam, and the foam is dried. Before degreasing the foam, the foam swelled from the surface of the bone portion 12 is crushed by the pressing roller. Therefore, before the foam is fired and the porous body 13 is formed, Since the foam 11 is fired after keeping the bone 11 in close contact with the aggregate 11, it is possible to surely realize a strong joint between the aggregate 11 and the porous body 13. In addition, the porosity and thickness of the porous body 13 can be adjusted with certainty, and a highly accurate composite porous body 10 can be formed.

  In particular, in this embodiment, since the bone part 11 is exposed from the end surface of the porous body 13, in the said composite porous body 10 made into the cylindrical shape, the bone part 11 is exposed from the axial direction end surface. For example, as shown in FIG. 4, when the composite porous body 10 is incorporated in the exhaust gas cleaning device 30, the shielding plates 34 a and 34 b are disposed on the axial end surfaces of the composite porous body 10. The bone portion 12 of the composite porous body 10 and the shielding plates 34a and 34b can be joined. Accordingly, it is possible to realize a strong and tight joint between the composite porous body 10 and the shielding plates 34 a and 34 b, and the exhaust gas 30 a leaks between the shielding plates 34 a and 34 b and the composite porous body 10. The occurrence of problems such as reverse flow can be suppressed.

  Further, when the foam is fired to form the porous body 13, the foam is energized and heated, so that the foam is uniformly heated and fired in the thickness direction and the direction along the surface. Therefore, variation in product quality of the obtained porous body 13 can be minimized.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the said embodiment, although the structure which made the porous body 13 below the thickness of the bone part 12 was shown, you may make the porous body 13 larger than the thickness of the bone part 12 not only this.
Further, when forming the foam by foaming the slurry S in the foaming tank, the two-dimensional mesh is formed by pressing the front and back surfaces of the bone portion 12 or placing a film member (for example, a PET film). 11A may be blocked to prevent the slurry S from foaming and expanding from the two-dimensional network 11A, or when the foam is fired, the foam is pushed by the energizing roll 24A. You may make it heat, crushing.

Furthermore, in the said embodiment, although the electrically-conductive roll 24A showed the structure provided with two or more places with respect to the running direction F of the bone part 12 in the baking furnace 23, it is not restricted to this but the bone part 12 and foaming in one place. It is good also as a structure which presses the front and back of a body. Further, in order to shorten the firing time, a pulse current is passed between the pair of energizing rolls 24A to cause discharge between the metal powders or between the aggregate 11 and the metal powders, and firing. May be. Furthermore, a so-called general resistance heating furnace or a sintering method by millimeter wave irradiation can be applied.
Moreover, in the said embodiment, when manufacturing the composite porous body 10, after the said foam is dried with the said drying furnace, before degreasing | defatting and baking with the said baking furnace part, the said foaming is carried out with the said press roll. Although the body is pressed, it is sufficient to perform this pressing as necessary, and it is not necessarily performed.

  Provided are a composite porous body capable of improving handleability and a method for producing the same.

In the composite porous body shown as one embodiment of the present invention, it is (a) the top view and (b) the side view. In the manufacturing method of the composite porous body shown as one embodiment of the present invention, it is a mimetic diagram showing an example which fills a slurry in the two-dimensional network of a bone part. It is a schematic diagram which shows an example at the time of baking a foam in the manufacturing method of the composite porous body shown as one Embodiment of this invention. It is the schematic of the exhaust-gas washing | cleaning apparatus to which the composite porous body shown in FIG. 1 is applied. It is the schematic of the reformer to which the composite porous body shown in FIG. 1 is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Composite porous body 11 Aggregate 11A Two-dimensional network 12 Bone part 13 Porous body S Slurry

Claims (5)

A plurality of aggregates are continuously provided in the surface direction, and a bone part in which a plurality of two-dimensional networks are defined by these aggregates, and a three-dimensional structure disposed inside the two-dimensional network of the bone parts A porous body having a network structure,
A composite porous body, wherein the porous body is bonded to the aggregate. The composite porous body according to claim 1, wherein
The composite porous body, wherein the porous body has a thickness equal to or less than the thickness of the bone part. In the composite porous body according to claim 1 or 2,
The composite porous body, wherein the aggregate is exposed from an end face of the porous body. A plurality of aggregates are continuously provided in the surface direction, and a plurality of two-dimensional networks are defined by these aggregates. Inside the two-dimensional network of the bone portion, a metal powder, a foaming agent, an organic binder, and a solvent Etc. are mixed with a slurry formed by mixing,
Then, after heating the slurry to foam the foaming agent to form a foam,
Drying and degreasing the foam,
Then, the said foam is baked and the porous body joined to the said aggregate of the said bone part is formed, The manufacturing method of the composite porous body characterized by the above-mentioned. In the manufacturing method of the composite porous body according to claim 4,
A method for producing a composite porous body, wherein the foam is energized and heated when the foam is fired to form the porous body.

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